[gnome-builder] prefs: fix drawing of last row border in plugins list

[Christian Hergert <chergert src gnome org>]

commit e91920ba5e737546a35988d07ccee8d42bac8183
Author: Christian Hergert <christian hergert me>
Date:   Wed Sep 9 00:46:31 2015 -0700

    prefs: fix drawing of last row border in plugins list

 data/theme/Adwaita-shared.css                 |    2 +-
 src/preferences/gb-preferences-page-plugins.c |    2 ++
 2 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/data/theme/Adwaita-shared.css b/data/theme/Adwaita-shared.css
index 3728988..bbf00e7 100644
--- a/data/theme/Adwaita-shared.css
+++ b/data/theme/Adwaita-shared.css
@@ -108,6 +108,6 @@ SymbolTree GtkSearchEntry {
 GbPreferencesPagePlugins GtkListBoxRow {
   border-bottom: 1px solid shade(@borders, 1.2);
 }
-.shortcuts-list-box GtkListBoxRow:last-child {
+GbPreferencesPagePlugins GtkListBoxRow:last-child {
   border-bottom: none;
 }
diff --git a/src/preferences/gb-preferences-page-plugins.c b/src/preferences/gb-preferences-page-plugins.c
index e400f77..70b233a 100644
--- a/src/preferences/gb-preferences-page-plugins.c
+++ b/src/preferences/gb-preferences-page-plugins.c
@@ -100,6 +100,8 @@ gb_preferences_page_plugins_reload (GbPreferencesPagePlugins *self)
   plugins = peas_engine_get_plugin_list (engine);
   for (iter = plugins; iter; iter = iter->next)
     gb_preferences_page_plugins_add_plugin (self, iter->data);
+
+  gtk_list_box_invalidate_sort (self->list_box);
 }
 
 static gint